This report focuses on the role that laws and norms play in humanitarian negotiations. The report is based on an initial set of 35 interviews that conducted by the Advanced Training Program on Humanitarian Action (ATHA) with humanitarian professionals between May and August 2016. This document will sketch out ATHA’s preliminary findings and analysis. The report is divided into five sections. Section I offers information about the methodology of the interviews that constitute the core empirical foundation for this report’s findings. Section II focuses on the role of international laws and norms in humanitarian negotiations. Section III addresses other sources of laws and norms (e.g., national laws and Islamic Law) that humanitarian practitioners have integrated into their negotiations. Section IV examines the relationship between interests and legal norms in the practice of humanitarian negotiation. Section V offers concluding remarks.